Hummer 2003 H2 Owner's Manual page 372

Corner Roof Marker Lamps
1. Remove the screw and lift off the lens.
6-38
2. Turn the socket counterclockwise to remove it and
remove the old bulb.
3. Put a new bulb into the socket.
4. Reinstall the socket into the lens and turn it
clockwise to lock it into place.
5. Hook the side of the lens with the hook end in the
notch first and then tighten the screw.